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The occupation of separate orbitals minimizes the repulsion energy between the electrons and hence leads to a lower energy than if they were confined to the same region of space.
There is a dominant attractive-binding-energy term proportional to the number of nucleons A. From this must be subtracted a surface-energy term proportional to surface area and a coulombic repulsion energy proportional to the square of the number of protons and inversely proportional to the nuclear radius.
PIXEL repulsion energy term (pairwise interaction).
U is the intradot electron-electron Coulomb repulsion energy.
However, for the analytical evaluation of the electron electron repulsion energy using the density (23b), much care must be taken.
The RA's and r1 are the spatial nuclear and electron coordinates, respectively, ZA's are the nuclear charges, and Vnn is the nuclear-nuclear repulsion energy.
Similar(44)
Their repulsion energies were ascertained by comparing ΔGθf values to be approximately 14 kJ mol−1 17 kJ mol−1, 18 kJ mol−1 22 kJ mol−1 and 7 kJ mol−1 9 kJ mol−1, respectively.
The non-electrostatic energy is also given as a sum of cavitation, dispersion, and repulsion energies.
Second, the solvation energy in the CPCM is given as a sum of electrostatic and non-electrostatic (cavitation, dispersion, and repulsion) energies, which is necessary to understand the relative importance of those interactions in determining the solvation energy.
cavitation, dispersion and repulsion energies, representing the cost of making a cavity in the solvent, as well as the attractive and repulsive parts of the van der Waals interactions between the solute and the solvent.
We noted that the non-polar solvation energy calculated by SASA is three to eight times smaller and of the opposite sign to the same energy calculated by the more accurate PCM (which includes separate terms for cavitation, dispersion and repulsion energies) or 3D-RISM methods [48,52].
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